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1z0-082 Exam Dumps : Oracle Database Administration I

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Oracle Database Administration I Questions and Answers

Question 1

Which four statements are true regarding primary and foreign key constraints and the effect they can have on table data? (Choose four.)

Options:

A.

A table can have only one primary key but multiple foreign keys

B.

A table can have only one primary key and one foreign key

C.

The foreign key columns and parent table primary key columns must have the same names

D.

It is possible for child rows that have a foreign key to remain in the child table at the time the parent row is deleted

E.

It is possible for child rows that have a foreign key to be deleted automatically from the child table at the time the parent row is deleted

F.

Only the primary key can be defined at the column and table level

G.

Primary key and foreign key constraints can be defined at both the column and table level

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Question 2

Examine the description of the SALES1 table:

SALES2 is a table with the same description as SALES1.

Some sales data is duplicated in both tables.

You want to display the rows from the SALES1 table which are not present in the SALES2 table.

Which set operator generates the required output?

Options:

A.

INTERSECT

B.

UNION ALL

C.

UNION

D.

SUBTRACT

E.

MINUS

Question 3

Which three statements are true about sequences in a single instance Oracle database?

Options:

A.

Sequences can always have gaps.

B.

A sequence can Issue duplicate values.

C.

A sequence's unallocated cached values are lost if the instance shuts down.

D.

Two or more tables cannot have keys generated from the same sequence.

E.

A sequence can only be dropped by a DBA.

F.

A sequence number that was allocated can be rolled back if a transaction fails.